Symptoms begin at mature leaves. Leaves are dark green and a bit smaller than normal. With ongoing phosphorus deficiency leaf blades show a purple tint. Tinting becomes brighter as leaves age and approach early senescence.
Acidic or very alkaline (calcareaus) soils. Low organic matter. Cold or wet conditions. Crops with a poorly developed root system. Soils with low P reserves. Soils with a high phosphate capacity. Iron rich soils.
Stronger plants, healthier plants with more resistance to cold weather. Bigger bolder berries. Improves efficiency of fungicide sprays. Reduces incidence of botrytis. Firmer berries with better storage potential. Increases shelf life.
Phosphorus deficiency Petioles of phosphorus deficient leaves contain less then 700 ppm acetic acid soluble phosphate-phosphorus, dry basis.
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Strawberry (field grown): Non-everbearing varieties, 3 applications of 10 l/ha from start of flowering. Repeat applications at 7-10 day intervals. Everbearing varieties, divide a total rate of 30 l/ha into 6 applications of 5 l/ha. Do not apply successive applications at intervals of less than 10-14 days. Water rate: 500 l/ha.
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Strawberries (fertigated): Crop specific recipes for 2 tank (A & B tank) systems can be produced using the Yara Fertigation Plan, for more details contact your local Yara area manager.
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Strawberries (fertigated): Crop specific recipes for 2 tank (A & B tank) systems can be produced using the Yara Fertigation Plan, for more details contact your local Yara area manager.
